Camp stove and fuel canister safety: propane, butane and Japan's cassette stoves

Small fuel canisters make camp cooking easy, and they're a staple of emergency kits. Their dangers are leaks and overheating. Here is what U.S. agencies say about propane, and what Japan has learned from decades of butane cassette stoves in homes.

Propane cylinders (NPS)

• Single-use (DOT-39) cylinders are for one use only and must never be refilled; refilling is extremely dangerous.
• Propane is heavier than air, so leaked gas settles in low spots and hugs the ground. If you smell gas, don't light appliances.
• Don't use cylinders that are dented, gouged, bulging, fire-damaged, corroded or excessively rusty.
• Don't store cylinders inside enclosed structures or where they'd be exposed to excessive heat.
• Don't vent unused propane; take the cylinder to your propane supplier for disposal.

NFPA's tip for hoses: brush on a light soap-and-water solution; a leak will make bubbles. If the flame goes out, turn off the gas and wait at least 5 minutes before relighting.

Butane stoves can fail too

In November 2025, CPSC announced a recall of about 201,000 single-burner butane camp stoves sold at Walmart, after 26 reports of the stoves exploding or catching fire, including 16 injuries such as second-degree burns. Check recalls for stoves you own.

What Japan teaches about butane cassette stoves

Japanese households keep tabletop cassette stoves for hot-pot meals and power outages, so Japan has studied their accidents closely. Back in 2011, NITE, its product safety agency, counted 175 accidents over six years, 58 involving explosions or burst canisters, and listed overheating from a nearby heat source first among the causes. The Tokyo Fire Department's current rules:

• Don't use cookware large enough to cover the stove; trapped heat can overheat the canister until it explodes.
• Never put two stoves side by side. A school festival in Japan had 15 people injured when two stoves under one griddle overheated a canister.
• Don't use heat-retaining plates or grill tops, and don't use the stove to light charcoal.
• Seat the canister's notch onto the stove's guide; if you hear or smell anything odd, remove it and stop (NITE).
• Use canisters within about 7 years of manufacture, and consider replacing the stove after about 10.

NITE adds: after use, remove the canister and store it below 40°C (104°F), away from heat, never in a hot car; never warm a canister to improve weak flow; and don't wall in a stove with bricks or blocks as a windscreen, which traps heat around the canister.

Use outdoors

USFA says propane, charcoal and pellet grills are for outdoor use only, and campfires belong at least 25 feet from tents and anything that can burn. Never use a stove inside a tent or vehicle; see Carbon monoxide at camp.

Our suggestions

• For big pans and griddles, use a proper two-burner camp stove or a fire grate, not a small canister stove.
• Rotate fuel like food: use the oldest canisters on camping trips.
• Store spare canisters upright in a ventilated, shaded spot, never in a closed car in summer.